Mitsubishi Montero (2004+). Manual — part 1007
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-27
STEP 2. Check the following connectors.
• HBB connector B-17 and B-18
Check connectors for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 3.
NO : Repair the faulty connector or terminal and then go to
Step 10.
STEP 3. Check the HBB ground circuit at HBB harness
connector B-17.
(1) Disconnect HBB connector B-17 and measure at the
harness connector (component side).
(2) Measure the resistance between terminal 7 and ground.
The resistance should measure less than 2 ohms.
Q: Is the measured resistance less than 2 ohms?
YES : Go to Step 4.
NO : Repair the harness wire between HBB connector
B-17 (terminal 7) and ground. Then go to Step 10.
AC204629 AB
CONNECTORS: B-17, B-18
B-17 (GR)
B-18 (B)
B-17
B-18
HBB CONNECTORS
AC204629 AC
CONNECTOR: B-17
B-17 (GR)
HBB CONNECTOR
B-17
ACX01937
1
2
3
4
5
6
7
8
AC
HARNESS CONNECTOR:
COMPONENT SIDE
B-17
(GR)
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-28
STEP 4. Check the HBB ground circuit at HBB harness
connector B-18.
(1) Disconnect HBB connector B-18 and measure at the
harness connector (component side).
(2) Measure the resistance between terminal 32 and ground.
The resistance should measure less than 2 ohms.
Q: Is the measured resistance less than 2 ohms?
YES : Go to Step 5.
NO : Repair the harness wire between HBB connector
B-18 (terminal 32) and ground. Then go to Step 10.
AC204629 AD
CONNECTOR: B-18
B-18 (B)
HBB CONNECTOR
B-18
AC204550
34
32
31
33
35
HARNESS CONNECTOR:
COMPONENT SIDE
AB
B-18 (B)
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-29
STEP 5. Check the HBB (continuity and resistance test of
the pump motor).
(1) Disconnect HBB connectors B-17 and B-18.
(2) Check for continuity and measure the resistance between
terminals at the HBB connectors.
Q: Does continuity exist between above terminals?
YES : Go to Step 7.
NO : Go to Step 6.
TESTER
CONNECTION
SPECIFIED
CONDITION
RESISTANCE
Ω
(REFERENCE VALUE)
2
− 7
Continuity
10 or less
2
− 8
Continuity
Approximately 33
2
− 31
Continuity
Less than 2
4
− 6
Continuity
Approximately 33
4
− 32
Continuity
Approximately 33
6
− 7
Continuity
Less than 2
6
− 32
Continuity
Less than 2
7
− 32
Continuity
Less than 2
8
− 31
Continuity
Approximately 33
31
− 32
Continuity
10 or less
AC204629 AB
CONNECTORS: B-17, B-18
B-17 (GR)
B-18 (B)
B-17
B-18
HBB CONNECTORS
ACX00662AC
B-18
B-17
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-30
STEP 6. Check the pump motor and lead wire.
).
(2) Remove the pump motor and the lead wire from the HBB
(Refer to
).
(3) Check the following items:
• Confirm that the pump motor operates when the battery
voltage is imposed at the pump motor terminal.
• Confirm the continuity of the lead wire.
Q: Are both of the pump motor and the lead wire in good
condition?
YES : Replace the master cylinder and hydraulic unit
). Then go to Step 10.
NO : Replace the pump motor or the lead wire (Refer to
STEP 7. Check the following connector.
• M-ASTC-ECU connector E-119
Check connector, for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
YES : Go to Step 8.
NO : Repair the faulty connector or terminal and then go to
Step 10.
AC203901
AC204627 AB
CONNECTOR: E-119
E-119
M-ASTC-ECU CONNECTOR
E-119
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